Steam-generator.



No. 738,964. PATENTED SEPT. 15, 1903.

D. A.-WALTON.

STEAM GENERATOR.

APPLIQA'ITION FILED JULY 11. 1903.

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APPLIOATION FILED JULY 11. 1903.

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Patented September 15, 1903.

PATENT OFFICE.

DRUID A WALTON, OF LOUISVILLE, KENTUCKY.

STEAM-GENERATOR.

SPEGiFICATION forming part of Letters Patent No. 738,964, datedSeptember 15, 1903. Application filed July 11I 1903. Serial No. 165,057-(Nc model.)

- To (ZZZ whom it may concern:

, circulating-tubes of larger relatively to the boiler,

Be it known that I, DRUID A. WALTON, a citizen of the United States ofAmerica, resid-' ing at Louisville, in the county of Jefferson and Stateof Kentucky, have invented certain new and useful Improvements inSteam-Generators, of which the following is a specification.

My invention has reference to improvements in the construction ofsteam-generators, and particularly to the means for directing the flameand gaseous products of combustion and also to provide means forobtaining a proper circulation of the water throughout the generator, mysaid improvements being particularly applicable to verticalsteam-generators and having for their object an increase in efficiencyby a better utilization of the gaseous products of combustion and abetter circulation of water in generators of this type than hasheretofore been accomplished.

With these objects in view my invention consists, essentially, in avertical boiler comprising a top. and bottom drum, a series ofconnecting water-tubes, and a plurality of diameter than thewater-tubes, and a furnace comprising a vertical partition-wall passingbetween the series of water-tubes, and the circulating-tubes beinglocated on opposite sides of said partition, I and afeed-water supplycommunicating with one of the circulating-tubes at or near its top.

The nature of my invention will best be understood when described inconnection with the accompanying drawings, in which- Figure 1 representsa vertical section of a steam-generator embodyingmy inventiomthe. planeof section being in the direction of the length of the furnace-grate.Fig. 2 is a horizontal section on the line 2 2, Fig. 1. Fig. 3 is asimilar section on the line 3 3, Fig. 1.

Fig. 4 is an enlarged vertical section showing the manner of attachingthe ends of the circulating-tubes to the heads of the drums.

Similar letters and numerals of reference designate corresponding partsthroughout the several views of the drawings.

Referring now to the drawings, the letter A designates a vertical boilercomprising primarily in its construction a lower drum a, suitablysupported in the masonry of the f urnace, anupper drum 1), inclosed by aproper coping c at the top of the furnace-walls, and a series of tubes1, connecting said drums, all as is usual in boilers of thisconstruction.

B is the fire-grate, placed in a furnace of a a usual construction, uponwhich the matter for combustion is consumed, and O is a partitionwallwhich in the present example extends upwardly from the lower drum,between the tubes, to a predetermined distance below the upper drum,thus dividing the flame or gas channels formed between the tubes intotwo series, in the first of which the gaseous prodnote of combustion andthe flame pass upwardly, while in the other series they pass downwardlyand into the arched chamber D, leading to the flue or chimney E. Thepartition-wall C is preferably arranged centrally with respect to theboiler-that is, to extend diametrically across the boiler-although itcould be placed to one side or the other. By means of thispartition-walll fully utilize the heat of the gases, and thereforeobtain an increased efficiency over and above such forms where the gasesare passed directly through the space surrounding the water-tubes, whichpractically forms the combustion-chamber in such types ofsteam-generators.

In the boilers of the class herein shown it has always been customary tomake the watertubes all of the same diameter. In the con structionherein shown I make use of a plurality of tubes F F of considerablylarger diameter than that of the regular water-tubes and place oneormore of said tubes on one side of the partition-walL-as, forinstance,the tube F-and the other, F, on the other side ofthepartition-wall. Thefeed-waterissupplied by means of a pipe G, whichpasses through the upper drum 1) to the circulating-tube F, asl shallhereinafter term thesetubes, and consequently the direction of thecirculation will be downwardly through said tube F to the lower drum aand .upwardly through all the smaller tubes 1 and down the circulatingtubes F under a forced condition,thus insur ing a substantially perfectcirculation and a ready separation of steam from the upper the two drumsfirmly together and increasing the strength of the boiler as a whole.The

manner of flanging the heads and riveting the tubes to such heads isbest seen in Fig. 4.

lVhat'I claim as new is- 1. Avertical boiler comprising a top and abottom drum, a series of connecting watertubes, and a plurality ofcirculating-tubes of larger diameter than the water-tubes, and a furnacecomprising a vertical partition-wall passing between the series ofwater-tubes and the circulating-tubes being located on opposite sides ofsaid partition, and a feed-water supply communicating with one of thecirculating-tubes at or near its top, substantially as and for thepurpose set forth.

2. A vertical boiler comprising a top and a bottom drum, a series ofconnecting watertubes, and a plurality of circulating-tubes of DRUID AiVALTON.

Witnesses y W. 'l. HALE, JOHN DIARSHALL

